Geometry 2.4 Adjacent Angles.

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Presentation transcript:

Geometry 2.4 Adjacent Angles

1. Next To 2. Nowhere Near 3. I Don’t Know 4. I Don’t Care What does Adjacent mean? 1. Next To 2. Nowhere Near 3. I Don’t Know 4. I Don’t Care

1. Next To 2. Nowhere Near 3. I Don’t Know 4. I Don’t Care What does Adjacent mean? 1. Next To 2. Nowhere Near 3. I Don’t Know 4. I Don’t Care

Adjacent Angles Share a Vertex and a Common Ray B

Name the 2 Adjacent Angles ABC and CBD A C B D

You can find the measure of a combined angle if you know the measures of the adjacent angles ABC + CBD = ? A ABD C B D

You can find the measure of a combined angle if you know the measures of the adjacent angles ABD = ? A 40 C 40 + 30 = 70 30 B D

You can find the measure of an outside angle if you know the measures of the inside angles ABD = ? A 20 C 20 + 30 = 50 30 B D

Now Apply What You Know

If the outside angle ABD = 100, and inside angle ABC = 60, what is the other inside angle CBD? 100 – 60 = 60 A C 40 ? B D

If the outside angle ABD = 25, and inside angle ABC = 15, what is the other inside angle CBD? 25 - 15 = 15 C 10 ? B D

Acute, Right, Obtuse, or Straight? Review!! Acute, Right, Obtuse, or Straight?

Name that Angle: Obtuse

Name that Angle: Obtuse

Name that Angle: Acute

Name that Angle: Straight

Name that Angle: Right

Ready 4 Some Problems?